Gio Lodi • 3/1/2017

How to use dependency injection for classes in Swift

This technical article explains how to apply dependency injection to static methods and classes in Swift, a common challenge in untestable legacy code. It demonstrates using type references (e.g., `Foo.Type`) and a protocol-based pattern to mock dependencies, enabling unit testing without major refactoring. The post includes code examples and cautions about testing behavior over implementation details.

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#unit testing #legacy code #dependency injection